Mechanism for converting motion.



No. 707,I|2. Patentd Aug. I9, |902. J. HORBUCKS.

MECHANISM FOR CONVERTING MOTION.

@Application led Jan 10, 1902.)

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No. 7o7,||2. Patented Ag. I9, |902.

J. HRRCKS.

MECHANISM FUR CONVERTING MUTIUN.

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MECHANISM FOR CONVERTING MOTION. (Application leq Jan. 10, 1902.) (NoModel.) a sheets-sheet a.

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UNITED STATES PATENT c* OFFICE. -w

JAMES I-IORROCKS, OF MANCHESTER, ENGLAND.

MECHANISM FoRfcoNvl-:Rrmc M oTloN.

SPECIFICATION forming part of Letters Patent No. 707,112, dated'August19, 1902.

' Application iiled January 10, 1902. Serial No. 89,148. 'VINO model.)`

vwhich I have filed application for British Patent No. 19,202, datedSeptember 26, 1901;) and I do hereby declare `the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains toma'ke and use thesame.

My said invention relates to an improved combinationof mechanism forconverting rotary motion 'into' reciprocating rectilinear motion. v Y

It is particularly advantageous forA operating the traversingthread-guide device used in winding machinery; but it .is alsoapplicable to other purposes where a uniform velocity at lall parts ofthe travel, combined with a practically instantaneous reversal of thedirection of motion, is required.

The accompanying drawings illustrate myV said invention as applied tothe operation of the thread-guides of a winding-machine.

Figure 1 is a plan. Fig. 2 is a sectional elevation on the plane A B ofFig. 1. Figs. 3, 4, and 5 are enlarged views of details to be presentlyexplained.

The shaft 1 of Fig. 2 is the main drivingshaft of a thread-windingmachine. `2 is the end of the carriage which carries the threadguidesand to which a reciprocating motion is to be imparted.

A v ertical shaft 3 derives continuous r0- tary motion through thebevel-wheels 3a 3b from the shaft l and transmits it to a pinion 4,secured to the upper end ofthe shaft 3. The pinion rotates in thedirection of the arrow fw, Fig.4 l. 1

The pinion 4is provided with teeth on only a portion of its periphery.

A sliding traverse-block 5 has internal racks 5a 5b, With their teethopposed to each other and set in such relative positions as to e11- gagealternately with the teeth of the pinion.

In Fig. 1 the teeth of vthe pinion are just commencing to engage withthe rack 5EL and will drive the traverse-block 5 tothe right while theplain periphery of thepinion 4 is passing clear ofthe points of theteeth of the other rack 5b. Whenthe teeth of the pinion in theircontinued revolution come into engagement with the rack 5h, thetraverseblock 5 will be driven a similar distance to the left, and soon. y

The method of obtaining a reciprocating motion from a pinion rotatingbetween two racks is not in itself new, and I make no broad claim tosuch a combination.V

According to my present invention I form the teeth of the pinion and ofthe racks at the place where they first come into engagement with eachother, of graduatedlengths. Thisis illustrated in Figa-13, 4, and 5.Fig. 3 is a plan. the traverse-block 5, seen in the direction of thearrow y of Fig. 3. The teeth oflthe rack are lettered from a to Z. Fig-5is `an elevation in the direction of the arrowoo of Fig. 3L The pinion 4is shown in fulllines. The teeth of the rack, with which it isj ust comiFig. 4 is a sectional elevation of ing into engagement, are indicated bydotted lines. lThe lettering of the teeth in this glure is necessarilyin the reverse order to Fig.

3. The pinion 4 (see Fig. 5) is undercut at 4' and 4b, and the teeth b cd e of the rack `are shortened in graduated or stepped fashion, so thatthe stepped overhanging portions of the pinion 4' 4b can pass clear overthem until the advancing fore edge 4 of the pinion meets the half-tootha of the rack when the latter begins to move. y The movement of the rackand the pinion now brings the fore edge 4d of the next overhanging partagainst the tooth b. The half-tooth 4e of the pinion comes next againstthe tooth c, and thereafter the full teeth of the pinion come intosuccessive 'engagement with the other teeth ofthe rack. Although onlyfour stepped teeth are shown by way of example it is to be understoodthat this may be varied to suit the pitch of the teeth and the diameterof the pinion. The object of the stepping is toenable the first-operating front face 4c of the pinionto reach Ythe tooth a withoutcomi'nginto contact'fwith the other teeth. Thenumber of teeth on thepinion and the positionof the racks is so-arranged that there is theleastfpossiblelinterval of time between the last tooth of the pinionleaving one rack and the part 4 meeting the tooth a of the other rack.To minimize shock on the reversal of the motion, I use buffers of rubberor other suitable material. Two of these, 6 and 7, are mountedvon therod 8, attached to and traveling with the carriage 2. The latter isconnected by the rod 8EL to the traverse-block 5. A stop 9 is formed ona bracket 9 between the buffers. In addition to these buffers forcushioning the carriage 2 I use two circular buffers l0 and ll, coveredwith hide or other suitable material. The circular buffers are free torotate on the pins on which they are mounted in slotted carriers 10a and1l, by means of which they may be very accurately adjusted, so as tocushion the stroke at the most suitable point. A similar circular buerl2 is mounted on a pin on the pinion 4c and is carried around by thelatter, so as to come alternatelyinto contact with the buii'ers l0 andll just before but almost simultaneously with the contact of the part 4of the pinion with the rack. Owing to the circular buers being free torotate ou their pins and the way the buer 12 meets the buffers l0 and1l, a cushioned rolling contact or impact is produced which absorbs themomentum of the moving parts and produces a comparatively smoothreversal of the motion. The buers 6 and 7 are also adjustable on the rod8 to enable them to be set so that the shock on reversal may be partlytaken up by them. The best result is obtained when the buffers lO, 11,and l2 are so set with regard to each other that they get thetraverse-block 5 slightly under Way in the reverse direction just beforethe pinion comes into action, the pinion, so to say, being allowed tofollow up the traverse-block. By carefully proportioning the number ofteeth to the bare part of the pinion and suitably setting the buers apractically instantaneous reversal is obtained of great value in yarn orthread winding machines, particularly those in which yarn is wound ontubes or bobbins without heads, where a very sudden reversal isnecessary in order to properly build up the yarn on the tube.

What I claim as my invention, and desire to secure by Letters Patent,is-

l. The combination of a continuously-rotating shaft, a pinion with teethof graduated lengths, a reciprocating traverse-block, having internalracks with teeth of graduated lengths, and buffers for minimizing shockand assisting the reversal of the reciprocating motion substantially asand for the purpose set forth and shown.

2. The combination of a reciprocating traverse-block, parallel opposedracks and an intervening driving-pinion, the said racks and pinionhaving the teeth Where they iirst engage of progressively varyinglengths substantially as and for the purpose set forth and shown.

3. The combination with a reciprocating traverse-block,operated byopposed racks,and an intervening continuously-rotatingdrivingpinion, ofbuiers rotatable on axes secured on the traverse-block and a buerrotatable on an axis secured on and revolving with the pinionsubstantially as and for the purpose set forth and shown.

In Witness whereof I have hereunto set my hand in the presence oftwo'witnesses.

JAMES HORROCKS.

Witnesses:

JOHN HALL, ALFRED T. WHIrELoW.

